This week's government shutdown could be just a warmup for an even bigger budget battle in a couple of weeks.

Congress has to raise the limit on the amount of money the federal government is allowed to borrow by Oct. 17. If the debt ceiling is not raised on time, President Obama warns that Washington won't be able to keep paying its bills.

"It'd be far more dangerous than a government shutdown, as bad as a shutdown is," Obama said Tuesday. "It would be an economic shutdown."